Question 162444
Assuming one hotdog goes in one bun, then the cost to the stall-holder is $50 + $0.55 per hotdog sold.
Expressing that as an algebraic equation

Let h = number of hotdogs

Cost (in $) = 50 + 0.55h

The revenue in $ = h  (one dollar per hotdog)

The breakeven point is when the cost equals the revenue

h = 50 + 0.55h

50 = 0.45h

h = 111.1

Therefore the stall holder will start making a profit on his 112th hotdog of the day